JP3212134U - Deburring and polishing equipment for workpieces - Google Patents

Abstract

[PROBLEMS] To deburr a workpiece by using both of the friction between the workpieces and the impact force of ultrasonic cavitation to greatly improve the deburring / polishing capability. A polishing apparatus is provided. SOLUTION: At least a part of a hexagonal storage basket 3 having a large number of through holes formed in an outer wall surrounding the periphery is immersed in a cleaning liquid in a cleaning tank 4, and the storage basket 3 is rotated around a horizontal rotation axis. The cleaning liquid in the cleaning tank 4 is circulated and degassed, and a plurality of ultrasonic vibrators 8 arranged on the lower surface side of the cleaning tank 4 are operated to emit ultrasonic waves into the cleaning liquid. Then, deburring is performed. [Selection] Figure 1

Description

  The present invention relates to a workpiece deburring and polishing apparatus that removes burrs from, for example, a relatively small workpiece and efficiently polishes the surface.

Conventionally, for example, as a technique for polishing the surface of a relatively small workpiece, a large number of workpieces are accommodated in a barrel container together with a particulate abrasive or compound (medium), and rotational movement and vibration are applied to the barrel container. Techniques such as barrel polishing for applying and polishing the surface of a workpiece are known. (For example, refer to Patent Document 1.)
On the other hand, a technique (for example, refer to Patent Document 2) that removes burrs to which a metal workpiece adheres by fatigue destruction using ultrasonic vibration is also known. In this technique, a side surface of a cylindrical container is known. A plurality of piezoelectric vibrators are mounted, the vibration surface of the piezoelectric vibrator protrudes to the inside of the cylindrical body, a metal work is accommodated in the container of the cylindrical body, and an oscillation output is applied to the piezoelectric vibrator. By doing so, ultrasonic vibration is caused, and burrs adhering to the metal workpiece are removed by fatigue destruction by this ultrasonic vibration.

JP 2013-169608 A JP-A-9-29614

  However, in the barrel polishing as in the former Patent Document 1, it is necessary to sort the polishing agent or compound (medium) and the workpiece after polishing, which is time consuming and time consuming. was there. In addition, as in the latter patent document 2, surface polishing by fatigue fracture due to ultrasonic vibration takes time and has a limit on the polishing ability of the workpiece surface as compared with the technology using the impact force of ultrasonic cavitation, For example, it is not suitable for a polishing operation for obtaining a smooth surface.

  Therefore, the present invention eliminates burrs from the workpiece and polishes the surface so that the entire deburring and polishing work is not time-consuming and the polishing ability can be dramatically increased without taking time. With the goal.

  In order to achieve the above object, the present invention provides a deburring and polishing apparatus for a workpiece that removes burrs from a workpiece and polishes the surface thereof, and can accommodate a plurality of workpieces and has a large number of transparent walls on its outer wall. A storage basket in which a hole is formed, a cleaning water storage tank capable of storing cleaning liquid and dipping at least a part of the storage basket, and a rotation capable of rotating the storage basket around a horizontal rotation axis And an ultrasonic oscillation means arranged below the cleaning liquid storage tank and capable of oscillating ultrasonic waves into the cleaning liquid.

A plurality of workpieces are housed in a housing basket that is at least partially immersed in the cleaning liquid, and the ultrasonic waves are simultaneously radiated into the cleaning liquid while rotating the workpieces. Burrs are removed from the workpiece and the surface is polished by the effect of the cavitation impact force caused by. In addition, after polishing, it is only necessary to take out the workpiece from the storage basket, and it does not take time, and the deburring effect and the polishing degree are extremely good. At this time, the effect of co-sliding by rotating the housing basket is mainly effective for deburring polishing of the surfaces where the outer surfaces of the workpieces are in direct contact with each other, and the effect of the impact force of cavitation by ultrasonic waves is Mainly, it is effective for deburring and polishing of the inner surface or the like where the workpieces such as recesses and holes formed in the workpiece are not in direct contact with each other.
The frequency range of the ultrasonic wave oscillating toward the cleaning liquid is preferably about 18 to 28 KHz, and the cleaning liquid is degassed to a dissolved oxygen amount of about 1 mg / liter or less and 4 to 8 ° C. If it is cooled to a certain extent, the impact force of cavitation can be strengthened.
Further, as the amount of the workpiece to be accommodated in the accommodation basket, for example, about 20 to 40% is preferable with respect to the total accommodation amount of the accommodation basket. Is demonstrated.

Further, in the present invention, as the accommodation basket, the cross-sectional shape orthogonal to the horizontal rotation axis is a hexagon. As a result, if the housing basket is rotated around the horizontal rotation axis, the effect of co-sliding is enhanced. On the other hand, if it is an octagonal shape or the like having a larger angle than the hexagonal shape, a cylindrical shape, or a square shape or a triangular shape whose angle is too small, the co-sliding effect of the rotating workpiece is impaired. There is a risk of being lost.
In addition, as the shape of the storage basket, instead of making the cross-sectional shape perpendicular to the rotation axis square, a partition wall or the like is provided at equal intervals around the rotation axis inside the storage basket, thereby enhancing the stirring effect. A scheme is also possible.

In the present invention, the height of the cleaning liquid stored in the cleaning liquid storage tank is λ / 4 + λ / 2 × n (n is a positive integer) where the wavelength of the radiated ultrasonic frequency is λ mm. ).
By adjusting the height of the liquid surface in this way, it is possible to suppress problems such as the liquid surface being disturbed by the influence of the shock wave and adversely affecting the cleaning tank, and the impact force of cavitation can be stabilized. .

At this time, it is preferable that the opening ratio of the through holes of the accommodation basket is 30 to 60% with respect to the total area of the outer wall.
That is, when the opening ratio of the through hole of the accommodation basket is less than 30%, the cavitation transmission ability tends to be lowered, and when it exceeds 60%, the durability of the outer wall tends to be inferior. Of these, about 40 to 50% is more preferable.

  By storing a plurality of workpieces in a storage basket that is at least partially immersed in the cleaning liquid, and rotating the same while simultaneously radiating ultrasonic waves into the cleaning liquid, the effects of co-sliding between the workpieces and the ultrasonic waves By removing the burrs from the workpiece and polishing the surface due to the effect of the impact force of cavitation, it is only necessary to remove the workpiece from the storage basket after polishing. It is good. At this time, the shape of the storage basket is hexagonal in cross section, the height of the cleaning liquid is set to a predetermined value, and the opening ratio of the through hole of the storage basket is set to a predetermined range, thereby removing the deburring polishing efficiency. Can be deburred and polished precisely.

It is explanatory drawing which shows an example of the whole structural example of the surface polishing apparatus which concerns on this invention. It is a structural example of an accommodation basket, (a) is a front view, (b) is a side view.

An example of a workpiece deburring and polishing apparatus according to the present invention will be described with reference to the accompanying drawings.
The deburring and polishing apparatus according to the present invention eliminates burrs from a relatively small workpiece and polishes the surface. The deburring and polishing of a workpiece is characterized by using both the effect of co-sliding between workpieces and the effect of the impact force of cavitation by ultrasonic waves. .

  As shown in FIG. 1, the deburring / polishing apparatus 1 has ultrasonic cleaning means 2 capable of oscillating ultrasonic waves in the cleaning liquid in the cleaning tank, and a part of the ultrasonic cleaning means 2 is immersed in the cleaning liquid in the cleaning tank. The housing basket 3 is configured to accommodate a plurality of workpieces and is rotatable about a horizontal rotation axis.

  The ultrasonic cleaning means 2 includes a cleaning tank 4 that can store cleaning water as a cleaning liquid, an overflow tank 18 adjacent to the cleaning tank 4, a circulation circuit 5 that can circulate the cleaning liquid overflowed from the cleaning tank 4, and this A vacuum hollow fiber module 6 provided in the middle of the circulation circuit 5 and capable of degassing the circulating cleaning liquid, a heat exchanger 7 for cooling the circulating cleaning liquid below a predetermined temperature, and a bottom surface of the cleaning tank 4 A plurality of ultrasonic transducers 8 are provided, and a cooling water introduction path 9 for feeding the cleaning liquid cooled in the cleaning tank 4 in the first stage is connected to the heat exchanger 7. Yes.

  In the middle of the circulation circuit 5, a strainer 11, a circulation pump 12, and a filter module 13 for removing foreign substances contained in the cleaning liquid are provided, and the vacuum hollow fiber module 6 is disposed downstream thereof. In addition, a vacuum pump 14 is connected to the vacuum hollow fiber module 6.

Then, while the cleaning liquid passes through the hollow fiber inside the vacuum hollow fiber module 6, the gas dissolved in the cleaning liquid can be degassed by evacuating the vacuum fiber from the periphery of the hollow fiber. . Incidentally, the degree of deaeration is such that the amount of gas in the cleaning liquid is about 1 mg / liter or less.
The number of vacuum hollow fiber modules 6 is arbitrary.

  Further, the heat exchanger 7 is provided further downstream of the vacuum hollow fiber module 6 so that the cleaning liquid is cooled to about 4 to 8 ° C. or less and then returned to the cleaning tank 4.

  The vibration frequency of the ultrasonic vibrator 8 is set to 18 to 28 KHz so that ultrasonic waves can be oscillated in the cleaning liquid upward from the bottom surface of the cleaning tank 4.

By the way, the height h of the liquid level of the cleaning liquid in the cleaning tank 4 is set to λ / 4 + λ / 2 × n (n is a positive integer) when the wavelength of the ultrasonic frequency to be emitted is λ mm.
This is because if the height h of the liquid level is set to this value, the amplitude of the ultrasonic wave radiated from the bottom surface of the cleaning tank 4 becomes zero near the height of the liquid level, and the wave is reflected in that state. Therefore, it is possible to prevent the cleaning tank 4 from being easily damaged due to the disturbance of the liquid level, the cleaning liquid in the cleaning tank 4 is stabilized, and cavitation generated in the liquid is also stabilized.

Next, the structure of the said accommodation basket 3 arrange | positioned in the washing tank 4 is demonstrated.
A part of the storage basket 3 is immersed in the cleaning liquid in the cleaning tank 4 and is rotated around a horizontal rotation shaft 15 by a driving source (not shown). As shown, the cross-sectional shape orthogonal to the rotating shaft 15 is a regular hexagon.

  In addition, a large number of through holes 17 are formed in the outer wall 16 of the storage basket 3 over the entire area, and the cleaning liquid can enter the storage basket 3 through the through holes 17.

In this embodiment, the aperture ratio of the through hole 17 to the outer wall 16 is 35 to 51% with respect to the total area of the outer wall 16. Incidentally, the opening ratio is preferably about 30 to 60%, and more preferably about 40 to 50%.
This is because when the opening ratio of the through holes 17 is less than 30%, the permeability of cavitation tends to be reduced, and when it exceeds 60%, the durability of the outer wall 16 tends to be inferior.

  A deburring polishing method in the above apparatus configuration will be described.

  For example, a relatively small workpiece such as a nut after cutting is housed in the housing basket 3. At this time, the capacity of the workpiece is preferably about 20 to 40% with respect to the capacity 100 of the accommodating basket 3, and if it is less than 20%, the work efficiency is poor, and if it exceeds 40%, the co-sliding effect is obtained. It tends to decline.

At least a part of the storage basket 3 is immersed by setting the storage basket 3 in a predetermined position of the cleaning tank 4 and introducing the degassed cleaning liquid into the cleaning tank 4.
Then, after the cleaning tank 4 is cut off from the outside, the ultrasonic vibrator 8 is operated to radiate ultrasonic waves into the cleaning liquid while circulating a part of the cleaning liquid through the circulation circuit 5, 3 is rotated around a horizontal rotation axis 15.
Here, the rotation speed of the accommodation basket 3 is set to about 3 to 10 rotations / m.

Then, by continuing the rotation of the container 3 and the emission of ultrasonic waves into the cleaning liquid for about 5 to 30 minutes, the burrs generated on the workpiece are removed cleanly and the surface of the workpiece is polished. Therefore, deburring and polishing can be performed very efficiently.
Further, after the deburring polishing is completed, the work is completed simply by taking out the workpiece from the housing basket 3, so that the work of separating from the abrasive such as barrel polishing is unnecessary, and the work is easy.

  By the method as described above, the deburring and polishing work of the workpiece can be performed very efficiently.

In addition, this invention is not limited to the above embodiments. Those having substantially the same configuration as the matters described in the claims of the utility model registration and having the same operational effects belong to the technical scope of the present invention.
For example, the type of the workpiece is arbitrary, and the degree of immersion of the container 3 in the cleaning liquid is also an example.

  Since the deburring / polishing work of the workpiece can be performed very efficiently and the polishing efficiency is high, it is expected that the deburring / polishing work for a small-sized workpiece will be widely used in the future.

DESCRIPTION OF SYMBOLS 1 ... Deburring polishing apparatus, 2 ... Ultrasonic cleaning means, 3 ... Storage basket, 4 ... Cleaning tank, 15 ... Rotating shaft, 16 ... Outer wall, 17 ... Through-hole.

Claims (4)

A deburring / polishing apparatus for a workpiece which removes burrs from a workpiece and polishes the surface thereof, and can accommodate a plurality of workpieces, and a plurality of through holes are formed in an outer wall surrounding the workpiece. A cleaning water storage tank capable of storing the cleaning liquid and immersing at least a part of the storage basket, a rotating means capable of rotating the storage basket around a horizontal rotation axis, and the cleaning liquid storage tank An apparatus for deburring and polishing a workpiece, comprising ultrasonic wave oscillating means disposed below and capable of oscillating ultrasonic waves toward the cleaning liquid. The workpiece deburring and polishing apparatus according to claim 1, wherein the housing basket has a hexagonal cross-sectional shape perpendicular to a horizontal rotation axis. The height of the liquid level of the cleaning liquid stored in the cleaning liquid storage tank is λ / 4 + λ / 2 × n (n is a positive integer) where the wavelength of the ultrasonic frequency to be emitted is λ mm. 3. The workpiece deburring and polishing apparatus according to claim 1, wherein the workpiece is deburred and polished. 4. The workpiece burr according to claim 1, wherein an opening ratio of the through hole of the accommodation basket is 30 to 80% with respect to a total area of the outer wall. 5. Take-off polishing equipment.

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